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Brion A, Chaud J, Klimezak M, Bolze F, Ohlmann L, Léonard J, Chassaing S, Frisch B, Kichler A, Heurtault B, Specht A. Photoactivatable Liposomes for Blue to Deep Red Light-Activated Surface Drug Release: Application to Controlled Delivery of the Antitumoral Drug Melphalan. Bioconjug Chem 2023. [PMID: 37392184 DOI: 10.1021/acs.bioconjchem.3c00197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2023]
Abstract
Liposome-based nanoparticles able to release, via a photolytic reaction, a payload anchored at the surface of the phospholipid bilayer were prepared. The liposome formulation strategy uses an original drug-conjugated blue light-sensitive photoactivatable coumarinyl linker. This is based on an efficient blue light-sensitive photolabile protecting group modified by a lipid anchor, which enables its incorporation into liposomes, leading to blue to green light-sensitive nanoparticles. In addition, the formulated liposomes were doped with triplet-triplet annihilation upconverting organic chromophores (red to blue light) in order to prepare red light sensitive liposomes able to release a payload, by upconversion-assisted photolysis. Those light-activatable liposomes were used to demonstrate that direct blue or green light photolysis or red light TTA-UC-assisted drug photolysis can effectively photorelease a drug payload (Melphalan) and kill tumor cells in vitro after photoactivation.
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Affiliation(s)
- Anaïs Brion
- 3Bio Team, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
| | - Juliane Chaud
- 3Bio Team, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
- Équipe de chimie et neurobiologie moléculaire, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
| | - Maxime Klimezak
- Équipe de chimie et neurobiologie moléculaire, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
| | - Frédéric Bolze
- Équipe de chimie et neurobiologie moléculaire, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
| | - Laura Ohlmann
- 3Bio Team, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
| | - Jérémie Léonard
- Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg/CNRS, UMR 7504, F-67034 Strasbourg, France
| | - Stefan Chassaing
- Institut de Chimie, Laboratoire de Synthèse, Réactivité Organiques & Catalyse, (LASYROC), Institut de Chimie, UMR 7177 Université de Strasbourg/CNRS, F-67000 Strasbourg, France
| | - Benoît Frisch
- 3Bio Team, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
| | - Antoine Kichler
- 3Bio Team, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
| | - Béatrice Heurtault
- 3Bio Team, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
| | - Alexandre Specht
- Équipe de chimie et neurobiologie moléculaire, Laboratoire de Conception et Application de Molécules Bioactives, Faculté de Pharmacie, UMR 7199 Université de Strasbourg/CNRS, F-67401 Illkirch Cedex, France
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2
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Thermoresponsive polysaccharide particles: Control of dissolution and release properties. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Kumari M, Lu RM, Li MC, Huang JL, Hsu FF, Ko SH, Ke FY, Su SC, Liang KH, Yuan JPY, Chiang HL, Sun CP, Lee IJ, Li WS, Hsieh HP, Tao MH, Wu HC. A critical overview of current progress for COVID-19: development of vaccines, antiviral drugs, and therapeutic antibodies. J Biomed Sci 2022; 29:68. [PMID: 36096815 PMCID: PMC9465653 DOI: 10.1186/s12929-022-00852-9] [Citation(s) in RCA: 75] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 09/01/2022] [Indexed: 12/12/2022] Open
Abstract
The novel coronavirus disease (COVID-19) pandemic remains a global public health crisis, presenting a broad range of challenges. To help address some of the main problems, the scientific community has designed vaccines, diagnostic tools and therapeutics for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. The rapid pace of technology development, especially with regard to vaccines, represents a stunning and historic scientific achievement. Nevertheless, many challenges remain to be overcome, such as improving vaccine and drug treatment efficacies for emergent mutant strains of SARS-CoV-2. Outbreaks of more infectious variants continue to diminish the utility of available vaccines and drugs. Thus, the effectiveness of vaccines and drugs against the most current variants is a primary consideration in the continual analyses of clinical data that supports updated regulatory decisions. The first two vaccines granted Emergency Use Authorizations (EUAs), BNT162b2 and mRNA-1273, still show more than 60% protection efficacy against the most widespread current SARS-CoV-2 variant, Omicron. This variant carries more than 30 mutations in the spike protein, which has largely abrogated the neutralizing effects of therapeutic antibodies. Fortunately, some neutralizing antibodies and antiviral COVID-19 drugs treatments have shown continued clinical benefits. In this review, we provide a framework for understanding the ongoing development efforts for different types of vaccines and therapeutics, including small molecule and antibody drugs. The ripple effects of newly emergent variants, including updates to vaccines and drug repurposing efforts, are summarized. In addition, we summarize the clinical trials supporting the development and distribution of vaccines, small molecule drugs, and therapeutic antibodies with broad-spectrum activity against SARS-CoV-2 strains.
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Affiliation(s)
- Monika Kumari
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
- Institute of Cellular and Organismic Biology, Academia Sinica, No. 128, Academia Road, Section 2, Nankang District, Taipei, 11529, Taiwan
| | - Ruei-Min Lu
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
| | - Mu-Chun Li
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
| | - Jhih-Liang Huang
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
| | - Fu-Fei Hsu
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
| | - Shih-Han Ko
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
| | - Feng-Yi Ke
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
- Institute of Cellular and Organismic Biology, Academia Sinica, No. 128, Academia Road, Section 2, Nankang District, Taipei, 11529, Taiwan
| | - Shih-Chieh Su
- Institute of Cellular and Organismic Biology, Academia Sinica, No. 128, Academia Road, Section 2, Nankang District, Taipei, 11529, Taiwan
| | - Kang-Hao Liang
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
| | - Joyce Pei-Yi Yuan
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
| | - Hsiao-Ling Chiang
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
| | - Cheng-Pu Sun
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - I-Jung Lee
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Wen-Shan Li
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
- Institute of Chemistry, Academia Sinica, Taipei, 11529, Taiwan
| | - Hsing-Pang Hsieh
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County, 35053, Taiwan
| | - Mi-Hua Tao
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Han-Chung Wu
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, 11571, Taiwan.
- Institute of Cellular and Organismic Biology, Academia Sinica, No. 128, Academia Road, Section 2, Nankang District, Taipei, 11529, Taiwan.
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4
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Ponti F, Campolungo M, Melchiori C, Bono N, Candiani G. Cationic lipids for gene delivery: many players, one goal. Chem Phys Lipids 2021; 235:105032. [PMID: 33359210 DOI: 10.1016/j.chemphyslip.2020.105032] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/23/2020] [Accepted: 12/19/2020] [Indexed: 12/28/2022]
Abstract
Lipid-based carriers represent the most widely used alternative to viral vectors for gene expression and gene silencing purposes. This class of non-viral vectors is particularly attractive for their ease of synthesis and chemical modifications to endow them with desirable properties. Despite combinatorial approaches have led to the generation of a large number of cationic lipids displaying different supramolecular structures and improved behavior, additional effort is needed towards the development of more and more effective cationic lipids for transfection purposes. With this review, we seek to highlight the great progress made in the design of each and every constituent domain of cationic lipids, that is, the chemical structure of the headgroup, linker and hydrophobic moieties, and on the specific effect on the assembly with nucleic acids. Since the complexity of such systems is known to affect their performances, the role of formulation, stability and phase behavior on the transfection efficiency of such assemblies will be thoroughly discussed. Our objective is to provide a conceptual framework for the development of ever more performing lipid gene delivery vectors.
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Affiliation(s)
- Federica Ponti
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy; Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Dept. Min-Met-Materials Engineering, Research Center of CHU de Quebec, Division of Regenerative Medicine, Laval University, Quebec City, QC, Canada
| | - Matilde Campolungo
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy
| | - Clara Melchiori
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy
| | - Nina Bono
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy.
| | - Gabriele Candiani
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy.
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5
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Hayashi K, Watanabe M, Iwasaki T, Shudou M, Uda RM. Endosomal escape by photo-activated fusion of liposomes containing a malachite green derivative: a novel class of photoresponsive liposomes for drug delivery vehicles. Photochem Photobiol Sci 2019; 18:1471-1478. [PMID: 30964475 DOI: 10.1039/c8pp00495a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We conducted photo-activated delivery of drugs based on the fusion of liposomes with endocytic membranes, thus allowing the direct release of encapsulated drugs inside the cytoplasm. As described in our earlier works, liposomes can be photoresponsive and fusogenic following the incorporation of a malachite green derivative carrying a long alkyl chain (MGL) into the lipid membrane. We prepared MGL liposomes using 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylcholine and encapsulated doxorubicin (DOX). Though the shape of MGL liposomes became elliptical after encapsulating DOX, UV irradiation did not enhance DOX leakage from MGL liposomes. We demonstrated the cellular uptake of MGL liposomes into murine cells derived from colon cancer (Colon 26 cells) using flow cytometry, and we found that the uptake was governed by a clathrin-dependent endocytosis pathway. Confocal fluorescence microscopic observations of Colon 26 cells treated with MGL liposomes encapsulating DOX revealed that DOX was localized in endosomes under dark conditions, while DOX was observed in the cytosol and nucleus after UV irradiation. The viability of Colon 26 cells treated with MGL liposomes encapsulating DOX was reduced by UV irradiation, indicating photo-induced enhancement of anti-cancer efficacy.
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Affiliation(s)
- Keita Hayashi
- Department of Chemical Engineering, National Institute of Technology, Nara college, Yata 22, Yamato-koriyama, Nara 639-1080, Japan.
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6
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Kauscher U, Holme MN, Björnmalm M, Stevens MM. Physical stimuli-responsive vesicles in drug delivery: Beyond liposomes and polymersomes. Adv Drug Deliv Rev 2019; 138:259-275. [PMID: 30947810 PMCID: PMC7180078 DOI: 10.1016/j.addr.2018.10.012] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/30/2018] [Accepted: 10/22/2018] [Indexed: 12/11/2022]
Abstract
Over the past few decades, a range of vesicle-based drug delivery systems have entered clinical practice and several others are in various stages of clinical translation. While most of these vesicle constructs are lipid-based (liposomes), or polymer-based (polymersomes), recently new classes of vesicles have emerged that defy easy classification. Examples include assemblies with small molecule amphiphiles, biologically derived membranes, hybrid vesicles with two or more classes of amphiphiles, or more complex hierarchical structures such as vesicles incorporating gas bubbles or nanoparticulates in the lumen or membrane. In this review, we explore these recent advances and emerging trends at the edge and just beyond the research fields of conventional liposomes and polymersomes. A focus of this review is the distinct behaviors observed for these classes of vesicles when exposed to physical stimuli - such as ultrasound, heat, light and mechanical triggers - and we discuss the resulting potential for new types of drug delivery, with a special emphasis on current challenges and opportunities.
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Affiliation(s)
- Ulrike Kauscher
- Department of Materials, Imperial College London, London SW7 2AZ, UK; Department of Bioengineering, Imperial College London, London SW7 2AZ, UK; Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Margaret N Holme
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-171 77, Sweden
| | - Mattias Björnmalm
- Department of Materials, Imperial College London, London SW7 2AZ, UK; Department of Bioengineering, Imperial College London, London SW7 2AZ, UK; Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Molly M Stevens
- Department of Materials, Imperial College London, London SW7 2AZ, UK; Department of Bioengineering, Imperial College London, London SW7 2AZ, UK; Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK; Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-171 77, Sweden.
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7
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Lou J, Carr AJ, Watson AJ, Mattern-Schain SI, Best MD. Calcium-Responsive Liposomes via a Synthetic Lipid Switch. Chemistry 2018; 24:3599-3607. [PMID: 29323763 DOI: 10.1002/chem.201705810] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Indexed: 12/31/2022]
Abstract
Liposomal drug delivery would benefit from enhanced control over content release. Here, we report a novel avenue for triggering release driven by chemical composition using liposomes sensitized to calcium-a target chosen due to its key roles in biology and disease. To demonstrate this principle, we synthesized calcium-responsive lipid switch 1, designed to undergo conformational changes upon calcium binding. The conformational change perturbs membrane integrity, thereby promoting cargo release. This was shown through fluorescence-based release assays via dose-dependent response depending on the percentage of 1 in liposomes, with minimal background leakage in controls. DLS experiments indicated dramatic changes in particle size upon treatment of liposomes containing 1 with calcium. In a comparison of ten naturally occurring metal cations, calcium provided the greatest release. Finally, STEM images showed significant changes in liposome morphology upon treatment of liposomes containing 1 with calcium. These results showcase lipid switches driven by molecular recognition principles as an exciting avenue for controlling membrane properties.
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Affiliation(s)
- Jinchao Lou
- Department of Chemistry, University of Tennessee, 1420 Circle Drive, Knoxville, TN, 37996, USA
| | - Adam J Carr
- Department of Chemistry, University of Tennessee, 1420 Circle Drive, Knoxville, TN, 37996, USA
| | - Alexa J Watson
- Department of Chemistry, University of Tennessee, 1420 Circle Drive, Knoxville, TN, 37996, USA
| | - Samuel I Mattern-Schain
- Department of Chemistry, University of Tennessee, 1420 Circle Drive, Knoxville, TN, 37996, USA
| | - Michael D Best
- Department of Chemistry, University of Tennessee, 1420 Circle Drive, Knoxville, TN, 37996, USA
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8
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Ansari AS, Santerre PJ, Uludağ H. Biomaterials for polynucleotide delivery to anchorage-independent cells. J Mater Chem B 2017; 5:7238-7261. [DOI: 10.1039/c7tb01833a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Comparison of various chemical vectors used for polynucleotide delivery to mammalian anchorage-independent cells.
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Affiliation(s)
- Aysha S. Ansari
- Department of Chemical & Materials Engineering
- Faculty of Engineering
- University of Alberta
- Edmonton
- Canada
| | - Paul J. Santerre
- Institute of Biomaterials & Biomedical Engineering
- University of Toronto
- Toronto
- Canada
| | - Hasan Uludağ
- Department of Chemical & Materials Engineering
- Faculty of Engineering
- University of Alberta
- Edmonton
- Canada
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9
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Venkatesh Y, Rajesh Y, Karthik S, Chetan AC, Mandal M, Jana A, Singh NDP. Photocaging of Single and Dual (Similar or Different) Carboxylic and Amino Acids by Acetyl Carbazole and its Application as Dual Drug Delivery in Cancer Therapy. J Org Chem 2016; 81:11168-11175. [PMID: 27754672 DOI: 10.1021/acs.joc.6b02152] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A new fluorescent photoremovable protecting group (FPRPG) based on acetylcarbazole framework has been explored for the first time release of single and dual (similar or different) substrates from single chromophore. Mechanistic studies of the photorelease process revealed that photorelease of two (similar or different) substrates from acetyl carbazole proceeds via a stepwise pathway. Further, we constructed photoresponsive dual drug delivery system (DDS) to release two different anticancer drugs (caffeic acid and chlorambucil, 1 equiv each). In vitro study reveals that our DDS exhibit excellent properties like biocompatibility, cellular uptake, and photoregulated dual drug release.
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Affiliation(s)
- Yarra Venkatesh
- Department of Chemistry, ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , 721302 West Bengal, India.,Biomaterials Group, ⊥Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
| | - Y Rajesh
- Department of Chemistry, ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , 721302 West Bengal, India.,Biomaterials Group, ⊥Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
| | - S Karthik
- Department of Chemistry, ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , 721302 West Bengal, India.,Biomaterials Group, ⊥Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
| | - A C Chetan
- Department of Chemistry, ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , 721302 West Bengal, India.,Biomaterials Group, ⊥Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
| | - Mahitosh Mandal
- Department of Chemistry, ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , 721302 West Bengal, India.,Biomaterials Group, ⊥Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
| | - Avijit Jana
- Department of Chemistry, ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , 721302 West Bengal, India.,Biomaterials Group, ⊥Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
| | - N D Pradeep Singh
- Department of Chemistry, ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , 721302 West Bengal, India.,Biomaterials Group, ⊥Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
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10
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Hersey JS, LaManna CM, Lusic H, Grinstaff MW. Stimuli responsive charge-switchable lipids: Capture and release of nucleic acids. Chem Phys Lipids 2016; 196:52-60. [PMID: 26896839 DOI: 10.1016/j.chemphyslip.2016.02.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Revised: 02/09/2016] [Accepted: 02/11/2016] [Indexed: 01/12/2023]
Abstract
Stimuli responsive lipids, which enable control over the formation, transformation, and disruption of supramolecular assemblies, are of interest for biosensing, diagnostics, drug delivery, and basic transmembrane protein studies. In particular, spatiotemporal control over a supramolecular structure can be achieved using light activated compounds to induce significant supramolecular rearrangements. As such, a family of cationic lipids are described which undergo a permanent switch in charge upon exposure to 365 nm ultraviolet (UV) light to enable the capture of negatively charged nucleic acids within the self-assembled supramolecular structure of the lipids and subsequent release of these macromolecules upon exposure to UV light and disruption of the assemblies. The lipids are composed of either two different tripeptide head groups, Lysine-Glycine-Glycine (KGG) and Glycine-Glycine-Glycine (GGG) and three different hydrocarbon chain lengths (C6, C10, or C14) terminated by a UV light responsive 1-(2-nitrophenyl)ethanol (NPE) protected carboxylic acid. The photolysis of the NPE protected lipid is measured as a function of time, and the resulting changes in net molecular charge are observed using zeta potential analysis for each head group and chain length combination. A proof of concept study for the capture and release of both linear DNA (calf thymus) and siRNA is presented using an ethidium bromide quenching assay where a balance between binding affinity and supramolecular stability are found to be the key to optimal nucleic acid capture and release.
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Affiliation(s)
- Joseph S Hersey
- Boston University, Biomedical Engineering Department, Boston, MA 02215, USA
| | - Caroline M LaManna
- Boston University, Biomedical Engineering Department, Boston, MA 02215, USA
| | - Hrvoje Lusic
- Boston University, Chemistry Department, Boston, MA 02215, USA
| | - Mark W Grinstaff
- Boston University, Biomedical Engineering Department, Boston, MA 02215, USA; Boston University, Chemistry Department, Boston, MA 02215, USA.
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11
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Alam S, Alves DS, Whitehead SA, Bayer AM, McNitt CD, Popik VV, Barrera FN, Best MD. A clickable and photocleavable lipid analogue for cell membrane delivery and release. Bioconjug Chem 2015; 26:1021-31. [PMID: 25927978 DOI: 10.1021/acs.bioconjchem.5b00044] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
For drug delivery purposes, the ability to conveniently attach a targeting moiety that will deliver drugs to cells and then enable controlled release of the active molecule after localization is desirable. Toward this end, we designed and synthesized clickable and photocleavable lipid analogue 1 to maximize the efficiency of bioconjugation and triggered release. This compound contains a dibenzocyclooctyne group for bioorthogonal derivatization linked via a photocleavable 2-nitrobenzyl moiety at the headgroup of a synthetic lipid backbone for targeting to cell membranes. To assess delivery and release using this system, we report fluorescence-based assays for liposomal modification and photocleavage in solution as well as through surface immobilization to demonstrate successful liposome functionalization and photoinduced release. In addition, fluorophore delivery to and release from live cells was confirmed and characterized using fluorescence microscopy and flow cytometry analysis in which 1 was delivered to cells, derivatized, and photocleaved. Finally, drug delivery studies were performed using an azide-tagged analogue of camptothecin, a potent anticancer drug that is challenging to deliver due to poor solubility. In this case, the ester attachment of the azide tag acted as a caging group for release by intracellular esterases rather than through photocleavage. This resulted in a dose-dependent response in the presence of liposomes containing delivery agent 1, confirming the ability of this compound to stimulate delivery to the cytoplasm of cells.
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Affiliation(s)
| | | | | | | | - Christopher D McNitt
- §Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Vladimir V Popik
- §Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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12
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Barman S, Mukhopadhyay SK, Gangopadhyay M, Biswas S, Dey S, Singh NDP. Coumarin–benzothiazole–chlorambucil (Cou–Benz–Cbl) conjugate: an ESIPT based pH sensitive photoresponsive drug delivery system. J Mater Chem B 2015; 3:3490-3497. [DOI: 10.1039/c4tb02081b] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed an ESIPT based drug delivery system, Cou–Benz–Cbl conjugate, with pH sensitive fluorescence properties and photocontrolled release of the anticancer drug chlorambucil.
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Affiliation(s)
- Shrabani Barman
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | | | | | - Sandipan Biswas
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | - Satyahari Dey
- Department of Biotechnology
- Indian Institute of Technology
- Kharagpur 721302
- India
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13
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Bayer AM, Alam S, Mattern-Schain SI, Best MD. Triggered Liposomal Release through a Synthetic Phosphatidylcholine Analogue Bearing a Photocleavable Moiety Embedded within thesn-2 Acyl Chain. Chemistry 2014; 20:3350-7. [DOI: 10.1002/chem.201304094] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Indexed: 01/31/2023]
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14
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Hong SK, Kim JC. Ethylcellulose Microparticles Containing Photo Cross-Linked Poly(vinyl alcohol)-Coumarin Conjugate. INT J POLYM MATER PO 2014. [DOI: 10.1080/00914037.2013.769242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Jones CH, Chen CK, Ravikrishnan A, Rane S, Pfeifer BA. Overcoming nonviral gene delivery barriers: perspective and future. Mol Pharm 2013; 10:4082-98. [PMID: 24093932 DOI: 10.1021/mp400467x] [Citation(s) in RCA: 285] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A key end goal of gene delivery research is to develop clinically relevant vectors that can be used to combat elusive diseases such as AIDS. Despite promising engineering strategies, efficiency and ultimately gene modulation efficacy of nonviral vectors have been hindered by numerous in vitro and in vivo barriers that have resulted in subviral performance. In this perspective, we concentrate on the gene delivery barriers associated with the two most common classes of nonviral vectors, cationic-based lipids and polymers. We present the existing delivery barriers and summarize current vector-specific strategies to overcome said barriers.
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Affiliation(s)
- Charles H Jones
- Department of Chemical and Biological Engineering, University at Buffalo, State University of New York , Buffalo, New York, 14260-4200, United States
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16
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Aytar BS, Muller JPE, Kondo Y, Abbott NL, Lynn DM. Spatial control of cell transfection using soluble or solid-phase redox agents and a redox-active ferrocenyl lipid. ACS APPLIED MATERIALS & INTERFACES 2013; 5:8283-8288. [PMID: 23965341 PMCID: PMC3789068 DOI: 10.1021/am402594z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report principles for active, user-defined control over the locations and timing with which DNA is expressed in cells. Our approach exploits unique properties of a ferrocenyl cationic lipid that is inactive when oxidized, but active when chemically reduced. We show that methods that exert spatial control over the administration of reducing agents can lead to local activation of lipoplexes and spatial control over gene expression. The versatility of this approach is demonstrated using both soluble and solid-phase reducing agents. These methods provide control over cell transfection, including methods for remote activation and the patterning of expression using solid-phase redox agents, that are difficult to achieve using conventional lipoplexes.
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Affiliation(s)
- Burcu S Aytar
- Department of Chemical and Biological Engineering, 1415 Engineering Drive, and §Department of Chemistry, 1101 University Avenue, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
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17
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Sun Y, Yan Y, Wang M, Chen C, Xu H, Lu JR. Controlled release of hydrophilic guest molecules from photoresponsive nucleolipid vesicles. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6232-6236. [PMID: 23758265 DOI: 10.1021/am401169m] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Amphiphilic hybrid nucleolipids bear the structural and functional hallmarks of both lipids and nucleic acids and hold great potential for biotechnological applications. However, further tailoring of their structures and properties for specific applications represents a major challenge. We here report a novel design and synthesis of a light-responsive nucleolipid by introducing an o-nitrobenzyl group that acts as a linker between a nucleotide and a lipid. The nucleolipid was applied readily to preparing smart vesicles and encapsulating hydrophilic guest molecules 5(6)-carboxyfluorescein (CF) in their inner aqueous phase. Upon light irradiation, their vesicular structure was disrupted as a result of the photolytic degradation of the nucleotide, resulting in CF release. Furthermore, temporally controlled CF release from these vesicles could be readily realized by turning on and off light. By demonstrating the molecular assembly and photodisassembly cycle, this report aims to stimulate further research exploring practical applications of nucleolipids.
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Affiliation(s)
- Yawei Sun
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao 266580, China
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18
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Abstract
In this work, we report on the development of a multifunctional and photo-inducible nanoplex made of chitosan (Ch) and hyaluronic acid (HA) for delivery of nucleic acid. Self-assembled Ch/HA nanoparticles were attached to ortho-nitrobenzyl (o-NB) photo-labile molecules (PL)-gold nanoparticles via thiol groups and to QDs-conjugate ssDNA through amide bond linkage to form nanoplexes (Ch:HA:AuPL:QD-DNA). The composition of DNA nanocarriers was validated by nuclear magnetic resonance, transmission electronic microscopy, energy dispersive x-ray spectroscopy, gel electrophoresis and spectrophotometry. The change in zeta potential (34 ± 11 to -26 ± 11 mV) and the loss of the o-NB characteristic peaks in nuclear magnetic resonance spectra, after the exposure of the PL molecule to ultraviolet light, both confirmed the photo-labile properties of the system. The potential of the nanoplexes to induce high cell transfection was assessed by flow cytometry and fluorescent microscopy imaging. Over 30% transfection of HEK-293 was obtained with the nanoplexes after a one-minute exposure of cells to UV light. This corresponds to a 15% increase in the transfection efficiency compared to unexposed Ch:HA:AuPL:QD-DNA nanocarriers. This high transfection efficiency was associated with the unique design of the carrier system and its photo-responsiveness feature for facilitating the DNA release.
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Aytar BS, Muller JPE, Golan S, Kondo Y, Talmon Y, Abbott NL, Lynn DM. Chemical oxidation of a redox-active, ferrocene-containing cationic lipid: influence on interactions with DNA and characterization in the context of cell transfection. J Colloid Interface Sci 2012; 387:56-64. [PMID: 22980739 DOI: 10.1016/j.jcis.2012.07.083] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 07/22/2012] [Accepted: 07/25/2012] [Indexed: 02/06/2023]
Abstract
We report an approach to the chemical oxidation of a ferrocene-containing cationic lipid [bis(11-ferrocenylundecyl)dimethylammonium bromide, BFDMA] that provides redox-based control over the delivery of DNA to cells. We demonstrate that BFDMA can be oxidized rapidly and quantitatively by treatment with Fe(III)sulfate. This chemical approach, while offering practical advantages compared to electrochemical methods used in past studies, was found to yield BFDMA/DNA lipoplexes that behave differently in the context of cell transfection from lipoplexes formed using electrochemically oxidized BFDMA. Specifically, while lipoplexes of the latter do not transfect cells efficiently, lipoplexes of chemically oxidized BFDMA promoted high levels of transgene expression (similar to levels promoted by reduced BFDMA). Characterization by SANS and cryo-TEM revealed lipoplexes of chemically and electrochemically oxidized BFDMA to both have amorphous nanostructures, but these lipoplexes differed significantly in size and zeta potential. Our results suggest that differences in zeta potential arise from the presence of residual Fe(2+) and Fe(3+) ions in samples of chemically oxidized BFDMA. Addition of the iron chelating agent EDTA to solutions of chemically oxidized BFDMA produced samples functionally similar to electrochemically oxidized BFDMA. These EDTA-treated samples could also be chemically reduced by treatment with ascorbic acid to produce samples of reduced BFDMA that do promote transfection. Our results demonstrate that entirely chemical approaches to oxidation and reduction can be used to achieve redox-based 'on/off' control of cell transfection similar to that achieved using electrochemical methods.
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Affiliation(s)
- Burcu S Aytar
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706, United States
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20
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Nakayama Y. Hyperbranched polymeric "star vectors" for effective DNA or siRNA delivery. Acc Chem Res 2012; 45:994-1004. [PMID: 22353143 DOI: 10.1021/ar200220t] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although gene therapy offers an attractive strategy for treating inherited disorders, current techniques using viral and nonviral delivery systems have not yielded many successful results in clinical trials. Viral vectors such as retroviruses, lentiviruses, and adenoviruses deliver genes efficiently; however, the possibility of negative outcomes from viral transformation cannot be completely ruled out. In contrast, various types of nonviral vectors are attracting considerable attention because they are easier to handle and induce weak immune responses. Cationic polymers, such as polyethylenimine (PEI) and poly(N,N-dimethylaminopropyl acrylamide) (PDMAPAAm), can generate nanoparticles through the formation of polyion complexes, "polyplexes" with DNA. These nonviral systems offer many advantages over viral systems. The primary obstacle to implementing these cationic polymers in an effective gene therapy remains their comparatively inefficient gene transfection in vivo. We describe four strategies for the development of hyperbranched star vectors (SVs) for enhancing DNA or siRNA delivery. The molecular design was performed by living radical polymerization in which the chain length can be controlled by photoirradiation and solution conditions, including concentrations of the monomer or iniferter (a molecule that serves as a combination of initiator, transfer agent, and terminator). The branch composition is controlled by the types of monomers that are added stepwise. In our first strategy, we prepared a series of only cationic PDMAPAAm-based SVs with no branches or 3, 4, or 6 branching numbers. These SVs could form polyion complexes (polyplexes) by mixing with DNA only in aqueous solution. The relative gene expression activity of the delivered DNA increased according to the degree of branching. In addition, increasing the molecular weight of SVs and narrowing their polydispersity index (PDI) improved their activity. For targeting DNA delivery to the specific cells, we modified the SV with ligands. Interestingly, the SV could adsorb the RGD peptide, making gene transfer possible in endothelial cells which are usually refractory to such treatments. The peptide was added to the polyplex solution without covalent derivatization to the SV. The introduction of additional branching by cross-linking using iniferter-induced coupling reactions further improved gene transfection activity. After block copolymerization of PDMAPAAm-based SVs with a nonionic monomer (DMAAm), the blocked SVs (BSVs) produced polyplexes with DNA that had excellent colloidal stability for 1 month, leading to efficient in vitro and in vivo gene delivery. Moreover, BSVs served as carriers for siRNA delivery. BSVs enhanced siRNA-mediated gene silencing in mouse liver and lung. As an alternative approach, we developed a novel gene transfection method in which the polyplexes were kept in contact with their deposition surface by thermoresponsive blocking of the SV. This strategy was more effective than reverse transfection and the conventional transfection methods in solution.
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Affiliation(s)
- Yasuhide Nakayama
- Division of Medical Engineering and Materials, National Cerebral and Cardiovascular Center Research Institute
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21
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Rodríguez-Muñiz GM, Marin ML, Lhiaubet-Vallet V, Miranda MA. Reactivity of nucleosides with a hydroxyl radical in non-aqueous medium. Chemistry 2012; 18:8024-7. [PMID: 22649034 DOI: 10.1002/chem.201201090] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Indexed: 12/27/2022]
Abstract
DNA damage: The reactivity of HO(.) with silylated 2'-deoxyribonucleosides was investigated in acetonitrile by means of a time-resolved technique. The obtained rate constants were in general slightly lower than those reported for the natural nucleosides in water. Analysis of the reaction mixture by UPLC-MS revealed that HO(.) attack occurred at the nucleobase (see scheme).
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Affiliation(s)
- Gemma M Rodríguez-Muñiz
- Instituto de Tecnología Química UPV-CSIC, Universidad Politécnica de Valencia, Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos, s/n, 46022 Valencia, Spain
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22
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Aytar BS, Muller JPE, Golan S, Hata S, Takahashi H, Kondo Y, Talmon Y, Abbott NL, Lynn DM. Addition of ascorbic acid to the extracellular environment activates lipoplexes of a ferrocenyl lipid and promotes cell transfection. J Control Release 2011; 157:249-59. [PMID: 21963768 DOI: 10.1016/j.jconrel.2011.09.074] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 09/11/2011] [Accepted: 09/15/2011] [Indexed: 12/12/2022]
Abstract
The level of cell transfection mediated by lipoplexes formed using the ferrocenyl lipid bis(11-ferrocenylundecyl)dimethylammonium bromide (BFDMA) depends strongly on the oxidation state of the two ferrocenyl groups of the lipid (reduced BFDMA generally mediates high levels of transfection, but oxidized BFDMA mediates very low levels of transfection). Here, we report that it is possible to chemically transform inactive lipoplexes (formed using oxidized BFMDA) to "active" lipoplexes that mediate high levels of transfection by treatment with the small-molecule reducing agent ascorbic acid (vitamin C). Our results demonstrate that this transformation can be conducted in cell culture media and in the presence of cells by addition of ascorbic acid to lipoplex-containing media in which cells are growing. Treatment of lipoplexes of oxidized BFDMA with ascorbic acid resulted in lipoplexes composed of reduced BFDMA, as characterized by UV/vis spectrophotometry, and lead to activated lipoplexes that mediated high levels of transgene expression in the COS-7, HEK 293T/17, HeLa, and NIH 3T3 cell lines. Characterization of internalization of DNA by confocal microscopy and measurements of the zeta potentials of lipoplexes suggested that these large differences in cell transfection result from (i) differences in the extents to which these lipoplexes are internalized by cells and (ii) changes in the oxidation state of BFDMA that occur in the extracellular environment (i.e., prior to internalization of lipoplexes by cells). Characterization of lipoplexes by small-angle neutron scattering (SANS) and by cryogenic transmission electron microscopy (cryo-TEM) revealed changes in the nanostructures of lipoplexes upon the addition of ascorbic acid, from aggregates that were generally amorphous, to aggregates with a more extensive multilamellar nanostructure. The results of this study provide guidance for the design of redox-active lipids that could lead to methods that enable spatial and/or temporal control of cell transfection.
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Affiliation(s)
- Burcu S Aytar
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706, USA
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Abstract
IMPORTANCE OF THE FIELD Nucleic acids such as plasmid DNA, antisense oligonucleotide, and RNA interference (RNAi) molecules, have a great potential to be used as therapeutics for the treatment of various genetic and acquired diseases. To design a successful nucleic acid delivery system, the pharmacological effect of nucleic acids, the physiological condition of the subjects or sites, and the physicochemical properties of nucleic acid and carriers have to be thoroughly examined. AREAS COVERED IN THIS REVIEW The commonly used lipids, polymers and corresponding delivery systems are reviewed in terms of their characteristics, applications, advantages and limitations. WHAT THE READER WILL GAIN This article aims to provide an overview of biological barriers and strategies to overcome these barriers by properly designing effective synthetic carriers for nucleic acid delivery. TAKE HOME MESSAGE A thorough understanding of biological barriers and the structure-activity relationship of lipid and polymeric carriers is the key for effective nucleic acid therapy.
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Affiliation(s)
- Lin Zhu
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, 19 South Manassas St, Cancer Research Building RM 226, Memphis, TN 38103, USA
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24
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Tomiyama T, Kang JH, Toita R, Niidome T, Katayama Y. Protein kinase Calpha-responsive polymeric carrier: its application for gene delivery into human cancers. Cancer Sci 2009; 100:1532-6. [PMID: 19459855 PMCID: PMC11159447 DOI: 10.1111/j.1349-7006.2009.01198.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
For cancer-targeting gene delivery, we applied a protein kinase C (PKC)alpha-responsive polymeric carrier to human cancers (U-87 MG [human glioblastoma-astrocytoma, epithelial-like cell line] and A549 [human lung adenocarcinoma epithelial cell line]). Two polymers, one a PKCalpha-responsive polymer (PPC[S]) containing the phosphorylation site serine, and the other a negative control polymer (PPC[A]), in which the serine was substituted with alanine, were synthesized. No cytotoxicity of the polymer was identified. When the complexes were transfected into cancer cells or tissues in which PKCalpha was hyper-activated, the luciferase expression from the PPC(S)/plasmid (pDNA) complex was higher than that from the PPC(A)/pDNA complex. These results show that the phosphorylation of complex by PKCalpha in cancer cells leads to high gene expression and that our system can be used as a human cancer cell-targeting gene delivery system.
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Affiliation(s)
- Tetsuro Tomiyama
- Graduate School of Systems Life Sciences, Kyushu University, Fukuoka, Japan
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25
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Bhattacharya S, Bajaj A. Advances in gene delivery through molecular design of cationic lipids. Chem Commun (Camb) 2009:4632-56. [DOI: 10.1039/b900666b] [Citation(s) in RCA: 232] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Affiliation(s)
| | - Eric E. Simanek
- Department of Chemistry, Texas A&M University, College Station, Texas 77843
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27
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Nagasaki T. Photoresponsive polymeric materials for drug delivery systems: double targeting with photo-responsive polymers. ACTA ACUST UNITED AC 2008. [DOI: 10.2745/dds.23.637] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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Abstract
The delivery of a variety of nucleic acids such as plasmid DNA (pDNA) and small interfering RNA (siRNA) to mammalian cells is both an important research tool and potential therapeutic approach. Synthetic vehicles (SVs) that include lipoplexes and polyplexes, are widely used for non-viral delivery. A promising method of improving the efficacy of this approach is to create SVs that are chemically dynamic, so that delivery is enabled by the cleavage of chemical bonds upon exposure to various physiological environments or external stimuli. An example of this approach is the use of masked endosomolytic agents (MEAs) that improve the release of nucleic acids from endosomes, a key step during transport. When the MEA enters the acidic environment of the endosome, a pH-labile bond is broken, releasing the agent';s endosomolytic capability. Another challenge has been to develop SVs that enable in vivo delivery. Recently, an MEA that was used within dynamic polyconjugates (DPCs) enabled the efficient delivery of siRNA into hepatocytes in vivo. The use of labile bonds to mask endosomolytic agents, provides a critical design feature, because it enables efficient in vivo delivery without sacrificing endosomolytic function for release into the cytoplasm.
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29
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Nagasaki T, Shinkai S. The concept of molecular machinery is useful for design of stimuli-responsive gene delivery systems in the mammalian cell. J INCL PHENOM MACRO 2007. [DOI: 10.1007/s10847-007-9303-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Aljaberi A, Spelios M, Kearns M, Selvi B, Savva M. Physicochemical properties affecting lipofection potency of a new series of 1,2-dialkoylamidopropane-based cationic lipids. Colloids Surf B Biointerfaces 2007; 57:108-17. [PMID: 17336044 PMCID: PMC1995744 DOI: 10.1016/j.colsurfb.2007.01.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2007] [Revised: 01/22/2007] [Accepted: 01/23/2007] [Indexed: 11/29/2022]
Abstract
The in vitro transfection activity of a novel series of N,N'-diacyl-1,2-diaminopropyl-3-carbamoyl-(aminoethane) derivatives was evaluated against a mouse melanoma cell line at different +/- charge ratios, in the presence and absence of helper lipids. Only the unsaturated derivative N,N'-dioleoyl-1,2-diaminopropyl-3-carbamoyl-(aminoethane), (1,2lmp[5]) mediated significant increase in the reporter gene level which was significantly boosted in the presence of DOPE peaking at +/- charge ratio of 2. The electrostatic interactions between the cationic liposomes and plasmid DNA were investigated by gel electrophoresis, fluorescence spectroscopy, dynamic light scattering and electrophoretic mobility techniques. In agreement with the transfection results, 1,2lmp[5]/DOPE formulation was most efficient in associating with and retarding DNA migration. The improved association between the dioleoyl derivative and DNA was further confirmed by ethidium bromide displacement assay and particle size distribution analysis of the lipoplexes. Differential scanning calorimetry studies showed that 1,2lmp[5] was the only lipid that exhibited a main phase transition below 37 degrees C. Likewise, 1,2lmp[5] was the only lipid found to form all liquid expanded monolayers at 23 degrees C. In conclusion, the current findings suggest that high in vitro transfection activity is mediated by cationic lipids characterized by increased acyl chain fluidity and high interfacial elasticity.
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Affiliation(s)
- Ahmad Aljaberi
- Division of Pharmaceutical Sciences, Arnold and Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, 75 Dekalb Avenue, Brooklyn, NY 11201, USA
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31
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Cheng N, Liu W, Cao Z, Ji W, Liang D, Guo G, Zhang J. A study of thermoresponsive poly(N-isopropylacrylamide)/polyarginine bioconjugate non-viral transgene vectors. Biomaterials 2006; 27:4984-92. [PMID: 16759696 DOI: 10.1016/j.biomaterials.2006.05.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2006] [Accepted: 05/10/2006] [Indexed: 11/29/2022]
Abstract
A thermoresponsive poly(N-isopropylacrylamide)/poly(l-arginine)bioconjugate (PNIPArg) was prepared by radical polymerization and EDC-activated coupling. The lower critical solution temperature (LCST) of PNIPArg aqueous solution determined by turbidimetry was around 35.2 degrees Celsius. The transmission electron microscope (TEM) showed that the PNIPArg/DNA complexes appeared uniform nanospheres with size about 50-120nm. Variable temperature circular dichroism (CD) and gel electrophoresis results revealed that the association and dissociation of PNIPArg/DNA complexes could be tuned by varying temperature; polyarginine (PArg) showed no temperature-controllable change of DNA condensate. Incorporation of PNIPAAm considerably decreased the cytotoxicity of PArg. The transfection level of PNIPArg and PArg was evaluated with COS-1 cells using two different reporter genes, pGL3-Control encoding luciferase and pEGP-C1 encoding green fluorescent protein (GFP). The transfection efficiency of PNIPArg incubated at 37 degrees Celsius for 22h, 20 degrees Celsius for 2h and 37 degrees Celsius for 24h was enhanced to a different extent depending on PNIPArg/DNA ratios compared to that incubated at 37 degrees Celsius for 48h. Encouragingly, at PNIPArg/DNA mass ratio of 3/1, the transfection efficiency of PNIPArg obtained with variable temperature route was equivalent to that of Lipofectamine 2000.
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Affiliation(s)
- Nan Cheng
- School of Materials Science and Engineering, Tianjin University, Tianjin 300072, PR China
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32
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Maeda T, Fujimoto K. A reduction-triggered delivery by a liposomal carrier possessing membrane-permeable ligands and a detachable coating. Colloids Surf B Biointerfaces 2006; 49:15-21. [PMID: 16574385 DOI: 10.1016/j.colsurfb.2006.02.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2005] [Revised: 02/09/2006] [Accepted: 02/12/2006] [Indexed: 11/30/2022]
Abstract
To control the cellular uptake of drugs and genes, we synthesized a liposomal carrier possessing membrane-permeable ligands and a detachable poly(ethylene glycol) (PEG) coating. For the detachable coating, a lipid having a thiolytic cleavable spacer (PEG-S-S-DOPE) was synthesized by the reaction of dioleoylphosphatidylethanolamine (DOPE) with a PEG chain via a disulfide linkage. The liposomes were prepared from a mixture of dipalmitoylphosphatidylcholine (DPPC), DOPE, PEG-S-S-DOPE, and cholesteryl hemisuccinate (CHEMS). The octamer (R8 peptide) of arginine was chosen as the membrane-permeable ligand and covalently immobilized onto the CHEMS portion of the liposome surface (PEG-S-S-R8-liposome). The disulfide bond of the PEG chain was cleaved to display the R8 peptides on the liposome surface by adding a reducing agent such as L-cysteine, and thereby internalization of the liposomes was significantly facilitated. When L-cysteine was added to the mixture of cells and the liposome that incorporated plasmids encoding the enhanced green fluorescence protein (pEGFP), the expression of EGFP was low but could be observed in almost 100% of the cells.
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Affiliation(s)
- Takuro Maeda
- The Center for Chemical Biology, School of Fundamental Science and Technology, Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
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33
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Kasireddy K, Ali SM, Ahmad MU, Choudhury S, Chien PY, Sheikh S, Ahmad I. Synthesis of cationic cardiolipin analogues. Bioorg Chem 2006; 33:345-62. [PMID: 16157362 DOI: 10.1016/j.bioorg.2005.06.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2005] [Revised: 06/07/2005] [Accepted: 06/16/2005] [Indexed: 11/25/2022]
Abstract
An approach was developed to synthesize a new class of cationic cardiolipin analogues containing two quaternary ammonium groups with tetra alkyl groups retaining "glycerol" moiety, the central core of the molecule. Cationic cardiolipin analogues were modified via introduction of either two or four oxyethylene groups to enhance the solubility in polar solvents. These newly synthesized cationic cardiolipin analogues can be applied to a broad range of drug delivery systems such as transfection reagents.
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Affiliation(s)
- Krishnudu Kasireddy
- Research and Development Facility, NeoPharm, Inc., 1850 Lakeside Drive, Waukegan, IL 60085, USA
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Chandra B, Subramaniam R, Mallik S, Srivastava DK. Formulation of photocleavable liposomes and the mechanism of their content release. Org Biomol Chem 2006; 4:1730-40. [PMID: 16633565 DOI: 10.1039/b518359f] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In pursuit of designing photocleavable liposomes as drug delivery vehicles, we synthesized several amphiphilic lipids by connecting stearyl amine (as the non-polar tail) and charged amino acids (as polar heads) via the o-nitrobenzyl derivatives. The lipids containing Glu, Asp, and Lys amino acids were subjected to photocleavage reaction by UV light, and the overall spectral changes of the chromophoric o-nitrobenzyl conjugates were determined as a function of time. The experimental data revealed that the feasibility of the cleavage reaction, nature and magnitude of the spectral changes during the course of the cleavage reaction, and their overall kinetic profiles were dictated by the type of amino acid constituting the polar head groups. The cleavage reactions of the Asp and Glu containing lipids were found to be more facile than that of the lysine-containing lipid. Using these lipids, we formulated photocleavable liposomes, and investigated the photo-triggered release of an encapsulated (within the liposomal lumen) dye as a function of time. The kinetic data revealed that the release of the liposomal content conformed to a two-step mechanism, of which the first (fast) step involved the photocleavage of lipids followed by the slow release of the liposomal content during the second step. The overall mechanistic features intrinsic to the photocleavage of Asp, Glu and Lys containing o-nitrobenzyl conjugated lipids, and their potential applications in formulating liposomes (whose contents can be "unloaded" by the UV light) as drug delivery vehicles are discussed.
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Affiliation(s)
- Binita Chandra
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, 58105, USA
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35
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Bhattacharya S, Bajaj A. Recent advances in lipid molecular design. Curr Opin Chem Biol 2005; 9:647-55. [PMID: 16257570 DOI: 10.1016/j.cbpa.2005.10.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2005] [Accepted: 10/13/2005] [Indexed: 11/23/2022]
Abstract
The area of lipid molecular design is attracting widespread interest among numerous research groups worldwide. Diverse lipid assemblies in aqueous media, such as vesicles, bilayers and nanorods, offer new applications in chemical biology. Lipids with specifically tailored molecular architecture have been successfully employed as gene delivery vehicles, for controlled drug release and the preparation of supramolecular gels. Such molecular design of lipids, as well as their characterization upon membrane formation, offers an insight into the possible molecular basis of their properties. This in turn helps in the design of further generations of lipid systems with more predictable characteristics. Here, we present an overview of the current trends in lipid design and their utilization in various biochemical, physical and chemical applications.
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Affiliation(s)
- Santanu Bhattacharya
- Department of Organic Chemistry, Indian Institute of Science, Bangalore - 560012, India.
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Cationic Nitrophospoamphiphiles of Phosphonate and Amidophosphonate Types. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2005. [DOI: 10.1007/s11178-005-0304-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Chandra B, Mallik S, Srivastava DK. Design of photocleavable lipids and their application in liposomal "uncorking". Chem Commun (Camb) 2005:3021-3. [PMID: 15959571 DOI: 10.1039/b503423j] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design of o-nitrobenzyl containing photocleavable lipid-amino acid conjugates, and their application in liposomal uncorking are described.
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Affiliation(s)
- Binita Chandra
- Department of Chemistry, Biochemistry and Molecular Biology, North Dakota State University, Fargo, ND-58105, USA
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Kasireddy K, Ahmad MU, Ali SM, Ahmad I. Synthesis of novel cationic cardiolipin analogues for the optimal delivery of therapeutic agents. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.02.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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